CVSROOT: /cvs
Module name: src
Changes by: niklas_(_at_)_cvs_(_dot_)_openbsd_(_dot_)_org 2004/08/12 00:11:57
Modified files:
sys/arch/i386/i386: ioapic.c apicvec.s
Log message:
Fix the shared irq problem, by allocating a low priority vector
so that the "high" pri interrupt gets blocked by the "low" spl & irq handler,
and raise the cpl to the "high" level in the handler, so that no other
in fact lower-leveled, interrupts can preempt the handling of the "high"
interrupt. This means that the "low" interrupt gets the same quality treatment,
thus causing some degradation in performance. Therefore we still issue a
diagnostic, so people can try to avoid the situation by tweaking their BIOS
settings. Note, there is still issues with dynamically established interrupts
which cause irq sharing, we are working on that.